Triple
T1327265
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Metra Milwaukee District West Line |
E28356
|
entity |
| Predicate | owner |
P347
|
FINISHED |
| Object | Northeast Illinois Regional Commuter Railroad Corporation (Metra) |
E3739
|
NE FINISHED |
How this triple was built (2 steps)
Every LLM step that produced this triple, in pipeline order — named-entity classification, the disambiguation choices (the exact options shown, with the pick highlighted), and the generated description. The batch + timestamp of each is in the Provenance table below.
NER
Named-entity recognition
gpt-5-mini
Instruction
Given a phrase, classify it is english named entity (e.g., persons, organizations, works of art) in Latin script, or not (e.g., literals, dates, URLs, verbose phrases). For disambiguation, the statement where the phrase occurs as object is also given. Please return a JSON object with `phrase` (string, the phrase being analyzed) and `is_ne` (boolean, indicating whether the phrase is a Named Entity).
Input
Phrase: Northeast Illinois Regional Commuter Railroad Corporation (Metra) | Statement: [Metra Milwaukee District West Line, owner, Northeast Illinois Regional Commuter Railroad Corporation (Metra)]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Northeast Illinois Regional Commuter Railroad Corporation (Metra) Context triple: [Metra Milwaukee District West Line, owner, Northeast Illinois Regional Commuter Railroad Corporation (Metra)]
-
A.
South Shore Line
The South Shore Line is an electric commuter rail service connecting Chicago with communities in northern Indiana, including Gary.
-
B.
Sangamon Mass Transit District
Sangamon Mass Transit District is the primary public bus transportation agency serving Springfield and surrounding areas in Sangamon County, Illinois.
-
C.
Metra Rock Island District line
The Metra Rock Island District line is a commuter rail route in the Chicago metropolitan area that connects downtown Chicago with various southwest suburbs, including Tinley Park.
-
D.
Regional Transportation Authority of Northeastern Illinois
chosen
The Regional Transportation Authority of Northeastern Illinois is the oversight and funding agency that coordinates public transit services, including those of the Chicago Transit Authority, across the Chicago metropolitan area.
-
E.
Champaign–Urbana Mass Transit District
The Champaign–Urbana Mass Transit District is the primary public bus system serving the Champaign–Urbana metropolitan area and the University of Illinois campus in Illinois.
- F. None of above.
- G. Unsure - the case is ambiguous/there is not enough information to decide.
Provenance (3 batches)
The batch behind each pipeline step, in order, with when it ran. Timestamps are batch-level — stages were processed in waves, so the object chain (NER → NED1 → NEDg → NED2) reads in order, but predicate / elicitation batches can sit in a different wave.
| Step | Stage | Batch ID | Status | When |
|---|---|---|---|---|
| creating | Elicitation | batch_69a498540a2481909e807a762280d3ba |
completed | March 1, 2026, 7:49 p.m. |
| NER | Named-entity recognition | batch_69a4c1c0a22881909eff0fc6c91a5f41 |
completed | March 1, 2026, 10:46 p.m. |
| NED1 | Entity disambiguation (via context triple) | batch_69acde12d0dc81908a09c0221b8db3f6 |
completed | March 8, 2026, 2:25 a.m. |
Created at: March 1, 2026, 7:55 p.m.